Yeah, well, used to be one step forward and two steps back. Had to stock up on sunglasses and weed if you ever intended on doing anything NOT in the sewers, or even in just a bright-ish place in the sewers. Had some bizarre resists and weaknesses too. It basically just took up a mutation slot and gave you something more to spend money on, plus a free "apartment" which you'd really only ever use for stashing more weed and more sunglasses.
I still liked being one though. Just 'cause of maaad covered-in-filth style points. I did wonder exactly how sanitary it was for me to be doing brain surgery while coated in liquid dung...
I kinda thought of them like the dwarves of HellMOO.
EDIT: Dwarves who had a 25% suffocation resistance, which really only meant that they were that much better at deepthroating.
Speaking of which, I recall the somewhat disturbing moment when I was just wandering around the Chud kingdom (sewers) again, and noticed I'd gotten horny again. Being a brainer, I didn't particularly want to be in that position. However, since WANKING IS FOR SAD PEOPLE, I summoned my posse and then began sodomizing one of them to relieve my urges (this was when I discovered that summoned chuds are all non-gendered).
...and then someone from WOMBAT walked in on me. Awkward.